Sheave block



March 22, 1932. yv. H. M KISSICK 1,850,407

' SHEAVE BLOCK Filed Oct. 25, 1929 2 Sheets-Sheet l gwuantoz March 22, 1932. w MCKISSICK 1,850,407

SHEAYE BLOCK Filed Oct. 25, 1929 2 Sheets-Sheet 2 r gwwmtoz f7 7 m j W May/m l atented Mar. 22, 1932 PATENT QFFICE WILLIAIM H. MCKISSICK, OF TULSA, OKLAHOMA SHEAVE BLDGK Application filed October 23, 1929. Serial No. 401,883.

This invention relates to new and useful improvements in sheave blocks.

One object of the invention is to provide an improved sheave block having certain particular features making for safety in handling and convenience and speed in manipulating. A particular object of the invention is to provide a block having one of its housing members pivotally suspended or hinged for 19 swinging in its own plane while the other housing member remains relatively stationary, thus making for an easy, quick and safe removal or threading of the cable lines.

Another object of the invention is to provide a sheave block in which the housing may be opened without disturbing either becket.

A further object of the invention is to simplify the manufacture of this type of block and to reduce the cost of production.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings in which an example of the invention is shown, and wherein:

Figure l is a side elevation of a sheave block constructed in accordance with the invention,

Figure 2 is an end view of the same,

Figure 3 is a perspective View of one of the housing members,

Figure 4 is a view similar to Figure 1 showing the block open,

Figure 5 is a view of the block partly in section and partly in elevation,

Figure 6 is a perspective view of the upper becket and guard yoke, and

Figure 7 is a view of the axle.

In the drawings the numeral 10 designates one of the members and 11 the complementary member ofa circular housing. An upper becket yoke 12 is mounted between the tops of the members. Each member includes an up right flat circular plate having inwardly directed guard flanges 13 at opposite ends curved to conform to the contour of the plate. These flanges" extend above and below the transverse center of the housing and have their inner vertical edges terminating in close proximity.

The becket yoke 12 includes a central ear 1% (Figures 5 and 6) depending between curved wings 15 conforming to the top contour of the housing and fitting therebetween. The tops of the members 10 and 11 are spaced apart by the parts 14 and 15. Vertical supporting bars or straps 16 embrace the outer sides or faces of the housing members. A top becket pin 17 through the housing members and the bars and receives a nut 18 on each of its reduced ends. By this arrangement the housing and bars are suspended by the pin 17.

supported'in the ear 14 passes The bars 16 hang below the housing and receive a bottom becket pin 19 held in place by nuts 20 mounted on its reduced ends. A bottom becket21 is hinged on the pin 19. The

nuts 18 and 20 bind against the'shouldered .7

ends of the pins, thus confining the parts, but

not binding them. The bars 16 have apertures 22 receiving a cylindrical axle 23 provided with a head 24 at one end bearing against the outer side of one of the bars; The

housing member 10 has an enlarged circular opening 25, while the member 11 has a smaller opening through which the axle passes.

The axle has a groove 27 and when the block is assembled the top edge of the opening 26 engages in said against displacement. A sheave or pulley 28 is journaled on the axle between the housing members and a thrust washer 29 surrounding the axle within the opening positions the hub of the sheave between said members. The sheave has itstop close to the ear 14 of the becket voke 12 and the wings overhang the sheave on each of its vertical axis. The top of the guards 13 are spaced from the ends of groove and holds the axle the wings 15 only sufliciently to permit the cable lines to freely pass therebetween, thus practically closing the top and ends of the housing.

It is desirable to fasten the housing members against swinging and for this purpose nuts 30 are welded or otherwise fastened to the inner faces of the housing plates 10 and 11 below the sheave. Machine bolts 31 passing through said plates and the bars 16 are engaged in said nuts. In Figures 1 and 2 the housing members are shown fastened in place and the block closed. When it is desired to open the block the bolt 31 holding the member is removed. The member being hinged on the pin 17 and by reason of the large opening 25, may be swung in its plane to the open position shown in Figure 4.

\Vhen the housing member 10 is swung its flanges 13 are carried out of registration with the flanges of the stationary member 11. The cable line may be threaded 19 and the bottom of the sheave and easily placed on the sheave. The closing of the block is obvious.

and 26 individually made therein.

housing plates may be made shorter and the flanges,

ing pivotally suspended from its top between the pin 7 By this structure the. members 10 and 11 I may be made in duplicate and the openings 1 means for suspending the housing" from its top, one of the housing members pe- 01' swinging in its plane to throw its guard flanges out of registration with the guard flanges of the other member, a sheave within the housing, and wings carried by thesuspending means and overhanging the sheave and separate from the housing. I

v In testimony whereof I affix my signature. 75

WILLIAM H. MOKISSICK.

pin can be removed as the axle 23 will hold the parts in place.

257 Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope ofthe appended claims.

What I claim is:

30 1. Ina safety sheave block, a suspending member, supporting bars carried by the suspending member, a housing between the bars comprising complementary members carried bythe suspending member and having normally registering upright .flanges, one of said members being hinged on the suspending member whereby it may be swung in its plane to withdraw its flanges from the flanges of the other member, and a sheave journaled in the housing.

with means for fastening the housing members to the bars, and a lower'becket pivoted between the lower ends of the bars.

3. The combination set forth in claim 1 with means for fastening the housing members to the bars, a lower becket suspended by the bars, and wings integral with the susending member and overhanging the sheave ut separate from the housing.

, 4. In a sheave block, an upper becket yoke, a pivot pin carried by the yoke, upright bars fastened on the pin, a housing including complementary members suspended on said pin at "their tops and having upright guard flanges, means for securing the housing members to the innersides of the bars, one of said securing means being removable, an axle carried by the bars, and a sheave journaled on the axle within the housing, one of the housing members having an enlarged within its opening to permit it to be swung plane on the supporting pin.

5. Ina sheave block, a houslng comprising I '2. The combination set forth'in claim 1 

